154977
The amplitude of an alternating voltage is $\mathbf{1 2 0}$ $V$. What will be its rms value?
1 $84.8 \mathrm{~V}$
2 $70.7 \mathrm{~V}$
3 $56.5 \mathrm{~V}$
4 $101.3 \mathrm{~V}$
Explanation:
A Given, Peak voltage, $\mathrm{V}_{0}=120 \mathrm{~V}$ The rms value of voltage, $\mathrm{V}_{\mathrm{rms}}=\frac{\mathrm{V}_{0}}{\sqrt{2}}=\frac{120}{\sqrt{2}}=84.8 \mathrm{~V}$
COMEDK 2017
Alternating Current
154984
The ratio of peak value and rms value of an alternating current is
1 1
2 $\frac{1}{2}$
3 $\sqrt{2}$
4 $\frac{1}{\sqrt{2}}$
Explanation:
C We know that, $I_{\text {rms }}=\frac{I_{0}}{\sqrt{2}}$ Where, $\mathrm{I}_{0}=$ Peak current $\frac{\mathrm{I}_{0}}{\mathrm{I}_{\mathrm{rms}}}=\sqrt{2}$ Hence, the ratio of peak value and rms value of alternating current is $\sqrt{2}$.
CG PET- 2005
Alternating Current
154985
An alternating voltage is represented as $E=20$ $\sin 300 \mathrm{t}$. The average value of voltage over one cycle will be
1 zero
2 $10 \mathrm{~V}$
3 $20 \sqrt{2} \mathrm{~V}$
4 $\frac{20}{\sqrt{2}} \mathrm{~V}$
Explanation:
A Given, Alternating voltage, $\mathrm{E}=20 \sin 300 \mathrm{t}$ The average value of voltage over one cycle will be zero because its sine function and average values of sine function over one cycle is always zero.
CG PET- 2005
Alternating Current
154995
If an AC produces same heat as that produced by a steady current of $4 \mathrm{~A}$, then peak value of current is :
1 $4 \mathrm{~A}$
2 $1.56 \mathrm{~A}$
3 $5.6 \mathrm{~A}$
4 $1.41 \mathrm{~A}$
Explanation:
C Given, $\mathrm{I}_{\mathrm{rms}}=4 \mathrm{~A}$ We know that, $\mathrm{I}_{\mathrm{rms}}=\frac{\mathrm{I}_{0}}{\sqrt{2}}$ The peak value of current $\left(\mathrm{I}_{0}\right)$ is, $\mathrm{I}_0=\mathrm{I}_{\mathrm{rms}} \sqrt{2}=4 \sqrt{2}=5.6 \mathrm{~A}$
JCECE-2006
Alternating Current
154996
A device for generating an alternating current of a desired frequency is known as :
1 an oscillator
2 an amplifier
3 a rectifier
4 none of these
Explanation:
A An oscillator are electronic circuit that generate a continues periodic wave form at a precise frequency. Amplifier is a device which increases the amplitude of the input signal. Rectifier is a circuit which converts AC to unidirectional pulsating output and in other words it converts AC to DC.
154977
The amplitude of an alternating voltage is $\mathbf{1 2 0}$ $V$. What will be its rms value?
1 $84.8 \mathrm{~V}$
2 $70.7 \mathrm{~V}$
3 $56.5 \mathrm{~V}$
4 $101.3 \mathrm{~V}$
Explanation:
A Given, Peak voltage, $\mathrm{V}_{0}=120 \mathrm{~V}$ The rms value of voltage, $\mathrm{V}_{\mathrm{rms}}=\frac{\mathrm{V}_{0}}{\sqrt{2}}=\frac{120}{\sqrt{2}}=84.8 \mathrm{~V}$
COMEDK 2017
Alternating Current
154984
The ratio of peak value and rms value of an alternating current is
1 1
2 $\frac{1}{2}$
3 $\sqrt{2}$
4 $\frac{1}{\sqrt{2}}$
Explanation:
C We know that, $I_{\text {rms }}=\frac{I_{0}}{\sqrt{2}}$ Where, $\mathrm{I}_{0}=$ Peak current $\frac{\mathrm{I}_{0}}{\mathrm{I}_{\mathrm{rms}}}=\sqrt{2}$ Hence, the ratio of peak value and rms value of alternating current is $\sqrt{2}$.
CG PET- 2005
Alternating Current
154985
An alternating voltage is represented as $E=20$ $\sin 300 \mathrm{t}$. The average value of voltage over one cycle will be
1 zero
2 $10 \mathrm{~V}$
3 $20 \sqrt{2} \mathrm{~V}$
4 $\frac{20}{\sqrt{2}} \mathrm{~V}$
Explanation:
A Given, Alternating voltage, $\mathrm{E}=20 \sin 300 \mathrm{t}$ The average value of voltage over one cycle will be zero because its sine function and average values of sine function over one cycle is always zero.
CG PET- 2005
Alternating Current
154995
If an AC produces same heat as that produced by a steady current of $4 \mathrm{~A}$, then peak value of current is :
1 $4 \mathrm{~A}$
2 $1.56 \mathrm{~A}$
3 $5.6 \mathrm{~A}$
4 $1.41 \mathrm{~A}$
Explanation:
C Given, $\mathrm{I}_{\mathrm{rms}}=4 \mathrm{~A}$ We know that, $\mathrm{I}_{\mathrm{rms}}=\frac{\mathrm{I}_{0}}{\sqrt{2}}$ The peak value of current $\left(\mathrm{I}_{0}\right)$ is, $\mathrm{I}_0=\mathrm{I}_{\mathrm{rms}} \sqrt{2}=4 \sqrt{2}=5.6 \mathrm{~A}$
JCECE-2006
Alternating Current
154996
A device for generating an alternating current of a desired frequency is known as :
1 an oscillator
2 an amplifier
3 a rectifier
4 none of these
Explanation:
A An oscillator are electronic circuit that generate a continues periodic wave form at a precise frequency. Amplifier is a device which increases the amplitude of the input signal. Rectifier is a circuit which converts AC to unidirectional pulsating output and in other words it converts AC to DC.
154977
The amplitude of an alternating voltage is $\mathbf{1 2 0}$ $V$. What will be its rms value?
1 $84.8 \mathrm{~V}$
2 $70.7 \mathrm{~V}$
3 $56.5 \mathrm{~V}$
4 $101.3 \mathrm{~V}$
Explanation:
A Given, Peak voltage, $\mathrm{V}_{0}=120 \mathrm{~V}$ The rms value of voltage, $\mathrm{V}_{\mathrm{rms}}=\frac{\mathrm{V}_{0}}{\sqrt{2}}=\frac{120}{\sqrt{2}}=84.8 \mathrm{~V}$
COMEDK 2017
Alternating Current
154984
The ratio of peak value and rms value of an alternating current is
1 1
2 $\frac{1}{2}$
3 $\sqrt{2}$
4 $\frac{1}{\sqrt{2}}$
Explanation:
C We know that, $I_{\text {rms }}=\frac{I_{0}}{\sqrt{2}}$ Where, $\mathrm{I}_{0}=$ Peak current $\frac{\mathrm{I}_{0}}{\mathrm{I}_{\mathrm{rms}}}=\sqrt{2}$ Hence, the ratio of peak value and rms value of alternating current is $\sqrt{2}$.
CG PET- 2005
Alternating Current
154985
An alternating voltage is represented as $E=20$ $\sin 300 \mathrm{t}$. The average value of voltage over one cycle will be
1 zero
2 $10 \mathrm{~V}$
3 $20 \sqrt{2} \mathrm{~V}$
4 $\frac{20}{\sqrt{2}} \mathrm{~V}$
Explanation:
A Given, Alternating voltage, $\mathrm{E}=20 \sin 300 \mathrm{t}$ The average value of voltage over one cycle will be zero because its sine function and average values of sine function over one cycle is always zero.
CG PET- 2005
Alternating Current
154995
If an AC produces same heat as that produced by a steady current of $4 \mathrm{~A}$, then peak value of current is :
1 $4 \mathrm{~A}$
2 $1.56 \mathrm{~A}$
3 $5.6 \mathrm{~A}$
4 $1.41 \mathrm{~A}$
Explanation:
C Given, $\mathrm{I}_{\mathrm{rms}}=4 \mathrm{~A}$ We know that, $\mathrm{I}_{\mathrm{rms}}=\frac{\mathrm{I}_{0}}{\sqrt{2}}$ The peak value of current $\left(\mathrm{I}_{0}\right)$ is, $\mathrm{I}_0=\mathrm{I}_{\mathrm{rms}} \sqrt{2}=4 \sqrt{2}=5.6 \mathrm{~A}$
JCECE-2006
Alternating Current
154996
A device for generating an alternating current of a desired frequency is known as :
1 an oscillator
2 an amplifier
3 a rectifier
4 none of these
Explanation:
A An oscillator are electronic circuit that generate a continues periodic wave form at a precise frequency. Amplifier is a device which increases the amplitude of the input signal. Rectifier is a circuit which converts AC to unidirectional pulsating output and in other words it converts AC to DC.
154977
The amplitude of an alternating voltage is $\mathbf{1 2 0}$ $V$. What will be its rms value?
1 $84.8 \mathrm{~V}$
2 $70.7 \mathrm{~V}$
3 $56.5 \mathrm{~V}$
4 $101.3 \mathrm{~V}$
Explanation:
A Given, Peak voltage, $\mathrm{V}_{0}=120 \mathrm{~V}$ The rms value of voltage, $\mathrm{V}_{\mathrm{rms}}=\frac{\mathrm{V}_{0}}{\sqrt{2}}=\frac{120}{\sqrt{2}}=84.8 \mathrm{~V}$
COMEDK 2017
Alternating Current
154984
The ratio of peak value and rms value of an alternating current is
1 1
2 $\frac{1}{2}$
3 $\sqrt{2}$
4 $\frac{1}{\sqrt{2}}$
Explanation:
C We know that, $I_{\text {rms }}=\frac{I_{0}}{\sqrt{2}}$ Where, $\mathrm{I}_{0}=$ Peak current $\frac{\mathrm{I}_{0}}{\mathrm{I}_{\mathrm{rms}}}=\sqrt{2}$ Hence, the ratio of peak value and rms value of alternating current is $\sqrt{2}$.
CG PET- 2005
Alternating Current
154985
An alternating voltage is represented as $E=20$ $\sin 300 \mathrm{t}$. The average value of voltage over one cycle will be
1 zero
2 $10 \mathrm{~V}$
3 $20 \sqrt{2} \mathrm{~V}$
4 $\frac{20}{\sqrt{2}} \mathrm{~V}$
Explanation:
A Given, Alternating voltage, $\mathrm{E}=20 \sin 300 \mathrm{t}$ The average value of voltage over one cycle will be zero because its sine function and average values of sine function over one cycle is always zero.
CG PET- 2005
Alternating Current
154995
If an AC produces same heat as that produced by a steady current of $4 \mathrm{~A}$, then peak value of current is :
1 $4 \mathrm{~A}$
2 $1.56 \mathrm{~A}$
3 $5.6 \mathrm{~A}$
4 $1.41 \mathrm{~A}$
Explanation:
C Given, $\mathrm{I}_{\mathrm{rms}}=4 \mathrm{~A}$ We know that, $\mathrm{I}_{\mathrm{rms}}=\frac{\mathrm{I}_{0}}{\sqrt{2}}$ The peak value of current $\left(\mathrm{I}_{0}\right)$ is, $\mathrm{I}_0=\mathrm{I}_{\mathrm{rms}} \sqrt{2}=4 \sqrt{2}=5.6 \mathrm{~A}$
JCECE-2006
Alternating Current
154996
A device for generating an alternating current of a desired frequency is known as :
1 an oscillator
2 an amplifier
3 a rectifier
4 none of these
Explanation:
A An oscillator are electronic circuit that generate a continues periodic wave form at a precise frequency. Amplifier is a device which increases the amplitude of the input signal. Rectifier is a circuit which converts AC to unidirectional pulsating output and in other words it converts AC to DC.
154977
The amplitude of an alternating voltage is $\mathbf{1 2 0}$ $V$. What will be its rms value?
1 $84.8 \mathrm{~V}$
2 $70.7 \mathrm{~V}$
3 $56.5 \mathrm{~V}$
4 $101.3 \mathrm{~V}$
Explanation:
A Given, Peak voltage, $\mathrm{V}_{0}=120 \mathrm{~V}$ The rms value of voltage, $\mathrm{V}_{\mathrm{rms}}=\frac{\mathrm{V}_{0}}{\sqrt{2}}=\frac{120}{\sqrt{2}}=84.8 \mathrm{~V}$
COMEDK 2017
Alternating Current
154984
The ratio of peak value and rms value of an alternating current is
1 1
2 $\frac{1}{2}$
3 $\sqrt{2}$
4 $\frac{1}{\sqrt{2}}$
Explanation:
C We know that, $I_{\text {rms }}=\frac{I_{0}}{\sqrt{2}}$ Where, $\mathrm{I}_{0}=$ Peak current $\frac{\mathrm{I}_{0}}{\mathrm{I}_{\mathrm{rms}}}=\sqrt{2}$ Hence, the ratio of peak value and rms value of alternating current is $\sqrt{2}$.
CG PET- 2005
Alternating Current
154985
An alternating voltage is represented as $E=20$ $\sin 300 \mathrm{t}$. The average value of voltage over one cycle will be
1 zero
2 $10 \mathrm{~V}$
3 $20 \sqrt{2} \mathrm{~V}$
4 $\frac{20}{\sqrt{2}} \mathrm{~V}$
Explanation:
A Given, Alternating voltage, $\mathrm{E}=20 \sin 300 \mathrm{t}$ The average value of voltage over one cycle will be zero because its sine function and average values of sine function over one cycle is always zero.
CG PET- 2005
Alternating Current
154995
If an AC produces same heat as that produced by a steady current of $4 \mathrm{~A}$, then peak value of current is :
1 $4 \mathrm{~A}$
2 $1.56 \mathrm{~A}$
3 $5.6 \mathrm{~A}$
4 $1.41 \mathrm{~A}$
Explanation:
C Given, $\mathrm{I}_{\mathrm{rms}}=4 \mathrm{~A}$ We know that, $\mathrm{I}_{\mathrm{rms}}=\frac{\mathrm{I}_{0}}{\sqrt{2}}$ The peak value of current $\left(\mathrm{I}_{0}\right)$ is, $\mathrm{I}_0=\mathrm{I}_{\mathrm{rms}} \sqrt{2}=4 \sqrt{2}=5.6 \mathrm{~A}$
JCECE-2006
Alternating Current
154996
A device for generating an alternating current of a desired frequency is known as :
1 an oscillator
2 an amplifier
3 a rectifier
4 none of these
Explanation:
A An oscillator are electronic circuit that generate a continues periodic wave form at a precise frequency. Amplifier is a device which increases the amplitude of the input signal. Rectifier is a circuit which converts AC to unidirectional pulsating output and in other words it converts AC to DC.
