266212
Which of the following statement is correct about photon.
1 Photon possesses positive charge
2 the rest masss of photon is same as mass of electron
3 the momentum of a photon is \(\mathrm{p}=\frac{\mathrm{hv}}{\mathrm{c}}\)
4 all of the above
Explanation:
c
**NCERT-XIIII-283**
TEST SERIES (PHYSICS FST)
266251
The frequencies of X-rays, \(y\)-rays and ultraviolet rays are respectively \(a, c\) and \(b\). Then:
1 \(ac\)
2 \(a>b, b>c\)
3 \(ab\)
4 \(a
Explanation:
c \(a
**NCERT-XII-I-209**
TEST SERIES (PHYSICS FST)
266252
In a resonant circuit with an inductor \(L\) (of negligible resistance) and a capacitor C in series produce oscillation of frequency f . If \(L\) is doubled and C is changed to 4 C , the frequency will be:
1 \(f / 2 \sqrt{2}\)
2 fl 2
3 \(1 / 4\)
4 \(8 f\)
Explanation:
a Frequency of LC oscillation \(=\frac{1}{2 \pi \sqrt{L C}}\) \[ \begin{aligned} & \frac{f_1}{f_2}=\frac{1}{\sqrt{L_1 C_1}} \sqrt{L_2 C_2}=\left(\frac{L_2 C_2}{L_1 C_1}\right)^{\frac{1}{2}} \\ & =\left(\frac{2 L \times 4 C}{L \times C}\right)=(8)^{1 / 2} \\ & \frac{f_1}{f_2}=2 \sqrt{2} \Rightarrow f_2=\frac{f_1}{2 \sqrt{2}} \text { or } \mathrm{f}_2=\frac{f}{2 \sqrt{2}} \end{aligned} \]
**NCERT-XII-I-189**
TEST SERIES (PHYSICS FST)
266253
A bar magnet of magnetic moment M is cut into two parts of equal length. The magnetic moment of each part will be:
1 M
2 2 M
3 zero
4 0.5 M
Explanation:
d Magnetic moment \(=\) pole strength \(\times\) length \[ M^{\prime}=\frac{M}{2}=0.5 \mathrm{M} \]
**NCERT-XII-I-140
TEST SERIES (PHYSICS FST)
266254
An ideal transformer consisting of 300 turns in the primary and 150 turns in the secondary coil. If the current in the secondary coil is 10 A , then the current in the primary coil are:
266212
Which of the following statement is correct about photon.
1 Photon possesses positive charge
2 the rest masss of photon is same as mass of electron
3 the momentum of a photon is \(\mathrm{p}=\frac{\mathrm{hv}}{\mathrm{c}}\)
4 all of the above
Explanation:
c
**NCERT-XIIII-283**
TEST SERIES (PHYSICS FST)
266251
The frequencies of X-rays, \(y\)-rays and ultraviolet rays are respectively \(a, c\) and \(b\). Then:
1 \(ac\)
2 \(a>b, b>c\)
3 \(ab\)
4 \(a
Explanation:
c \(a
**NCERT-XII-I-209**
TEST SERIES (PHYSICS FST)
266252
In a resonant circuit with an inductor \(L\) (of negligible resistance) and a capacitor C in series produce oscillation of frequency f . If \(L\) is doubled and C is changed to 4 C , the frequency will be:
1 \(f / 2 \sqrt{2}\)
2 fl 2
3 \(1 / 4\)
4 \(8 f\)
Explanation:
a Frequency of LC oscillation \(=\frac{1}{2 \pi \sqrt{L C}}\) \[ \begin{aligned} & \frac{f_1}{f_2}=\frac{1}{\sqrt{L_1 C_1}} \sqrt{L_2 C_2}=\left(\frac{L_2 C_2}{L_1 C_1}\right)^{\frac{1}{2}} \\ & =\left(\frac{2 L \times 4 C}{L \times C}\right)=(8)^{1 / 2} \\ & \frac{f_1}{f_2}=2 \sqrt{2} \Rightarrow f_2=\frac{f_1}{2 \sqrt{2}} \text { or } \mathrm{f}_2=\frac{f}{2 \sqrt{2}} \end{aligned} \]
**NCERT-XII-I-189**
TEST SERIES (PHYSICS FST)
266253
A bar magnet of magnetic moment M is cut into two parts of equal length. The magnetic moment of each part will be:
1 M
2 2 M
3 zero
4 0.5 M
Explanation:
d Magnetic moment \(=\) pole strength \(\times\) length \[ M^{\prime}=\frac{M}{2}=0.5 \mathrm{M} \]
**NCERT-XII-I-140
TEST SERIES (PHYSICS FST)
266254
An ideal transformer consisting of 300 turns in the primary and 150 turns in the secondary coil. If the current in the secondary coil is 10 A , then the current in the primary coil are:
266212
Which of the following statement is correct about photon.
1 Photon possesses positive charge
2 the rest masss of photon is same as mass of electron
3 the momentum of a photon is \(\mathrm{p}=\frac{\mathrm{hv}}{\mathrm{c}}\)
4 all of the above
Explanation:
c
**NCERT-XIIII-283**
TEST SERIES (PHYSICS FST)
266251
The frequencies of X-rays, \(y\)-rays and ultraviolet rays are respectively \(a, c\) and \(b\). Then:
1 \(ac\)
2 \(a>b, b>c\)
3 \(ab\)
4 \(a
Explanation:
c \(a
**NCERT-XII-I-209**
TEST SERIES (PHYSICS FST)
266252
In a resonant circuit with an inductor \(L\) (of negligible resistance) and a capacitor C in series produce oscillation of frequency f . If \(L\) is doubled and C is changed to 4 C , the frequency will be:
1 \(f / 2 \sqrt{2}\)
2 fl 2
3 \(1 / 4\)
4 \(8 f\)
Explanation:
a Frequency of LC oscillation \(=\frac{1}{2 \pi \sqrt{L C}}\) \[ \begin{aligned} & \frac{f_1}{f_2}=\frac{1}{\sqrt{L_1 C_1}} \sqrt{L_2 C_2}=\left(\frac{L_2 C_2}{L_1 C_1}\right)^{\frac{1}{2}} \\ & =\left(\frac{2 L \times 4 C}{L \times C}\right)=(8)^{1 / 2} \\ & \frac{f_1}{f_2}=2 \sqrt{2} \Rightarrow f_2=\frac{f_1}{2 \sqrt{2}} \text { or } \mathrm{f}_2=\frac{f}{2 \sqrt{2}} \end{aligned} \]
**NCERT-XII-I-189**
TEST SERIES (PHYSICS FST)
266253
A bar magnet of magnetic moment M is cut into two parts of equal length. The magnetic moment of each part will be:
1 M
2 2 M
3 zero
4 0.5 M
Explanation:
d Magnetic moment \(=\) pole strength \(\times\) length \[ M^{\prime}=\frac{M}{2}=0.5 \mathrm{M} \]
**NCERT-XII-I-140
TEST SERIES (PHYSICS FST)
266254
An ideal transformer consisting of 300 turns in the primary and 150 turns in the secondary coil. If the current in the secondary coil is 10 A , then the current in the primary coil are:
266212
Which of the following statement is correct about photon.
1 Photon possesses positive charge
2 the rest masss of photon is same as mass of electron
3 the momentum of a photon is \(\mathrm{p}=\frac{\mathrm{hv}}{\mathrm{c}}\)
4 all of the above
Explanation:
c
**NCERT-XIIII-283**
TEST SERIES (PHYSICS FST)
266251
The frequencies of X-rays, \(y\)-rays and ultraviolet rays are respectively \(a, c\) and \(b\). Then:
1 \(ac\)
2 \(a>b, b>c\)
3 \(ab\)
4 \(a
Explanation:
c \(a
**NCERT-XII-I-209**
TEST SERIES (PHYSICS FST)
266252
In a resonant circuit with an inductor \(L\) (of negligible resistance) and a capacitor C in series produce oscillation of frequency f . If \(L\) is doubled and C is changed to 4 C , the frequency will be:
1 \(f / 2 \sqrt{2}\)
2 fl 2
3 \(1 / 4\)
4 \(8 f\)
Explanation:
a Frequency of LC oscillation \(=\frac{1}{2 \pi \sqrt{L C}}\) \[ \begin{aligned} & \frac{f_1}{f_2}=\frac{1}{\sqrt{L_1 C_1}} \sqrt{L_2 C_2}=\left(\frac{L_2 C_2}{L_1 C_1}\right)^{\frac{1}{2}} \\ & =\left(\frac{2 L \times 4 C}{L \times C}\right)=(8)^{1 / 2} \\ & \frac{f_1}{f_2}=2 \sqrt{2} \Rightarrow f_2=\frac{f_1}{2 \sqrt{2}} \text { or } \mathrm{f}_2=\frac{f}{2 \sqrt{2}} \end{aligned} \]
**NCERT-XII-I-189**
TEST SERIES (PHYSICS FST)
266253
A bar magnet of magnetic moment M is cut into two parts of equal length. The magnetic moment of each part will be:
1 M
2 2 M
3 zero
4 0.5 M
Explanation:
d Magnetic moment \(=\) pole strength \(\times\) length \[ M^{\prime}=\frac{M}{2}=0.5 \mathrm{M} \]
**NCERT-XII-I-140
TEST SERIES (PHYSICS FST)
266254
An ideal transformer consisting of 300 turns in the primary and 150 turns in the secondary coil. If the current in the secondary coil is 10 A , then the current in the primary coil are:
266212
Which of the following statement is correct about photon.
1 Photon possesses positive charge
2 the rest masss of photon is same as mass of electron
3 the momentum of a photon is \(\mathrm{p}=\frac{\mathrm{hv}}{\mathrm{c}}\)
4 all of the above
Explanation:
c
**NCERT-XIIII-283**
TEST SERIES (PHYSICS FST)
266251
The frequencies of X-rays, \(y\)-rays and ultraviolet rays are respectively \(a, c\) and \(b\). Then:
1 \(ac\)
2 \(a>b, b>c\)
3 \(ab\)
4 \(a
Explanation:
c \(a
**NCERT-XII-I-209**
TEST SERIES (PHYSICS FST)
266252
In a resonant circuit with an inductor \(L\) (of negligible resistance) and a capacitor C in series produce oscillation of frequency f . If \(L\) is doubled and C is changed to 4 C , the frequency will be:
1 \(f / 2 \sqrt{2}\)
2 fl 2
3 \(1 / 4\)
4 \(8 f\)
Explanation:
a Frequency of LC oscillation \(=\frac{1}{2 \pi \sqrt{L C}}\) \[ \begin{aligned} & \frac{f_1}{f_2}=\frac{1}{\sqrt{L_1 C_1}} \sqrt{L_2 C_2}=\left(\frac{L_2 C_2}{L_1 C_1}\right)^{\frac{1}{2}} \\ & =\left(\frac{2 L \times 4 C}{L \times C}\right)=(8)^{1 / 2} \\ & \frac{f_1}{f_2}=2 \sqrt{2} \Rightarrow f_2=\frac{f_1}{2 \sqrt{2}} \text { or } \mathrm{f}_2=\frac{f}{2 \sqrt{2}} \end{aligned} \]
**NCERT-XII-I-189**
TEST SERIES (PHYSICS FST)
266253
A bar magnet of magnetic moment M is cut into two parts of equal length. The magnetic moment of each part will be:
1 M
2 2 M
3 zero
4 0.5 M
Explanation:
d Magnetic moment \(=\) pole strength \(\times\) length \[ M^{\prime}=\frac{M}{2}=0.5 \mathrm{M} \]
**NCERT-XII-I-140
TEST SERIES (PHYSICS FST)
266254
An ideal transformer consisting of 300 turns in the primary and 150 turns in the secondary coil. If the current in the secondary coil is 10 A , then the current in the primary coil are:
