Basic Quantities in AC
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PHXII07:ALTERNATING CURRENT

356084 The instantaneous current from an \(a.c.\) source is \(I = 6\sin 314\,t\). What is the rms value of the current?

1 \(3\sqrt 2 \,amp\)
2 \(2\sqrt 2 \,amp\)
3 \(\sqrt 2 \,amp\)
4 \(2\,amp\)
PHXII07:ALTERNATING CURRENT

356085 A voltmeter connected in an \(A . C\) circuit reads \(220\,V\). It represents,

1 Peak voltage
2 \(R M S\) voltage
3 Average voltage
4 Mean square voltage
PHXII07:ALTERNATING CURRENT

356086 The current \(vs\) time graph is shown in the figure. Find the average and \(rms\) currents
supporting img

1 \(\frac{{{i_0}}}{2},\frac{{{i_0}}}{{\sqrt 2 }}\)
2 \({i_0},\frac{{{i_0}}}{2}\)
3 \({i_0},\frac{{{i_0}}}{{\sqrt 2 }}\)
4 \(\frac{{{i_0}}}{2},{i_0}\)
PHXII07:ALTERNATING CURRENT

356087 The maximum value of \(a\).\(c\). voltage in a circuit is 707 \(V\). Its \(r\).\(m\).\(s\). value is

1 \(100\,V\)
2 \(707\,V\)
3 \(70.7\,V\)
4 \(500\,V\)
PHXII07:ALTERNATING CURRENT

356088 If \(E = 100\sin (100t)\) volt and \(I = 100\sin \left( {100t + \frac{\pi }{3}} \right)mA\) are the instantaneous values of voltage and current, then the \(r\).\(m\).\(s\). values of voltage and current are respectively.

1 \(141.4\,V,141.4\,A\)
2 \(141.4\,V,141.4\,mA\)
3 \(70.7\,V,70.7A\)
4 \(70.7\,V,70.7mA\)
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PHXII07:ALTERNATING CURRENT

356084 The instantaneous current from an \(a.c.\) source is \(I = 6\sin 314\,t\). What is the rms value of the current?

1 \(3\sqrt 2 \,amp\)
2 \(2\sqrt 2 \,amp\)
3 \(\sqrt 2 \,amp\)
4 \(2\,amp\)
PHXII07:ALTERNATING CURRENT

356085 A voltmeter connected in an \(A . C\) circuit reads \(220\,V\). It represents,

1 Peak voltage
2 \(R M S\) voltage
3 Average voltage
4 Mean square voltage
PHXII07:ALTERNATING CURRENT

356086 The current \(vs\) time graph is shown in the figure. Find the average and \(rms\) currents
supporting img

1 \(\frac{{{i_0}}}{2},\frac{{{i_0}}}{{\sqrt 2 }}\)
2 \({i_0},\frac{{{i_0}}}{2}\)
3 \({i_0},\frac{{{i_0}}}{{\sqrt 2 }}\)
4 \(\frac{{{i_0}}}{2},{i_0}\)
PHXII07:ALTERNATING CURRENT

356087 The maximum value of \(a\).\(c\). voltage in a circuit is 707 \(V\). Its \(r\).\(m\).\(s\). value is

1 \(100\,V\)
2 \(707\,V\)
3 \(70.7\,V\)
4 \(500\,V\)
PHXII07:ALTERNATING CURRENT

356088 If \(E = 100\sin (100t)\) volt and \(I = 100\sin \left( {100t + \frac{\pi }{3}} \right)mA\) are the instantaneous values of voltage and current, then the \(r\).\(m\).\(s\). values of voltage and current are respectively.

1 \(141.4\,V,141.4\,A\)
2 \(141.4\,V,141.4\,mA\)
3 \(70.7\,V,70.7A\)
4 \(70.7\,V,70.7mA\)
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PHXII07:ALTERNATING CURRENT

356084 The instantaneous current from an \(a.c.\) source is \(I = 6\sin 314\,t\). What is the rms value of the current?

1 \(3\sqrt 2 \,amp\)
2 \(2\sqrt 2 \,amp\)
3 \(\sqrt 2 \,amp\)
4 \(2\,amp\)
PHXII07:ALTERNATING CURRENT

356085 A voltmeter connected in an \(A . C\) circuit reads \(220\,V\). It represents,

1 Peak voltage
2 \(R M S\) voltage
3 Average voltage
4 Mean square voltage
PHXII07:ALTERNATING CURRENT

356086 The current \(vs\) time graph is shown in the figure. Find the average and \(rms\) currents
supporting img

1 \(\frac{{{i_0}}}{2},\frac{{{i_0}}}{{\sqrt 2 }}\)
2 \({i_0},\frac{{{i_0}}}{2}\)
3 \({i_0},\frac{{{i_0}}}{{\sqrt 2 }}\)
4 \(\frac{{{i_0}}}{2},{i_0}\)
PHXII07:ALTERNATING CURRENT

356087 The maximum value of \(a\).\(c\). voltage in a circuit is 707 \(V\). Its \(r\).\(m\).\(s\). value is

1 \(100\,V\)
2 \(707\,V\)
3 \(70.7\,V\)
4 \(500\,V\)
PHXII07:ALTERNATING CURRENT

356088 If \(E = 100\sin (100t)\) volt and \(I = 100\sin \left( {100t + \frac{\pi }{3}} \right)mA\) are the instantaneous values of voltage and current, then the \(r\).\(m\).\(s\). values of voltage and current are respectively.

1 \(141.4\,V,141.4\,A\)
2 \(141.4\,V,141.4\,mA\)
3 \(70.7\,V,70.7A\)
4 \(70.7\,V,70.7mA\)
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PHXII07:ALTERNATING CURRENT

356084 The instantaneous current from an \(a.c.\) source is \(I = 6\sin 314\,t\). What is the rms value of the current?

1 \(3\sqrt 2 \,amp\)
2 \(2\sqrt 2 \,amp\)
3 \(\sqrt 2 \,amp\)
4 \(2\,amp\)
PHXII07:ALTERNATING CURRENT

356085 A voltmeter connected in an \(A . C\) circuit reads \(220\,V\). It represents,

1 Peak voltage
2 \(R M S\) voltage
3 Average voltage
4 Mean square voltage
PHXII07:ALTERNATING CURRENT

356086 The current \(vs\) time graph is shown in the figure. Find the average and \(rms\) currents
supporting img

1 \(\frac{{{i_0}}}{2},\frac{{{i_0}}}{{\sqrt 2 }}\)
2 \({i_0},\frac{{{i_0}}}{2}\)
3 \({i_0},\frac{{{i_0}}}{{\sqrt 2 }}\)
4 \(\frac{{{i_0}}}{2},{i_0}\)
PHXII07:ALTERNATING CURRENT

356087 The maximum value of \(a\).\(c\). voltage in a circuit is 707 \(V\). Its \(r\).\(m\).\(s\). value is

1 \(100\,V\)
2 \(707\,V\)
3 \(70.7\,V\)
4 \(500\,V\)
PHXII07:ALTERNATING CURRENT

356088 If \(E = 100\sin (100t)\) volt and \(I = 100\sin \left( {100t + \frac{\pi }{3}} \right)mA\) are the instantaneous values of voltage and current, then the \(r\).\(m\).\(s\). values of voltage and current are respectively.

1 \(141.4\,V,141.4\,A\)
2 \(141.4\,V,141.4\,mA\)
3 \(70.7\,V,70.7A\)
4 \(70.7\,V,70.7mA\)
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PHXII07:ALTERNATING CURRENT

356084 The instantaneous current from an \(a.c.\) source is \(I = 6\sin 314\,t\). What is the rms value of the current?

1 \(3\sqrt 2 \,amp\)
2 \(2\sqrt 2 \,amp\)
3 \(\sqrt 2 \,amp\)
4 \(2\,amp\)
PHXII07:ALTERNATING CURRENT

356085 A voltmeter connected in an \(A . C\) circuit reads \(220\,V\). It represents,

1 Peak voltage
2 \(R M S\) voltage
3 Average voltage
4 Mean square voltage
PHXII07:ALTERNATING CURRENT

356086 The current \(vs\) time graph is shown in the figure. Find the average and \(rms\) currents
supporting img

1 \(\frac{{{i_0}}}{2},\frac{{{i_0}}}{{\sqrt 2 }}\)
2 \({i_0},\frac{{{i_0}}}{2}\)
3 \({i_0},\frac{{{i_0}}}{{\sqrt 2 }}\)
4 \(\frac{{{i_0}}}{2},{i_0}\)
PHXII07:ALTERNATING CURRENT

356087 The maximum value of \(a\).\(c\). voltage in a circuit is 707 \(V\). Its \(r\).\(m\).\(s\). value is

1 \(100\,V\)
2 \(707\,V\)
3 \(70.7\,V\)
4 \(500\,V\)
PHXII07:ALTERNATING CURRENT

356088 If \(E = 100\sin (100t)\) volt and \(I = 100\sin \left( {100t + \frac{\pi }{3}} \right)mA\) are the instantaneous values of voltage and current, then the \(r\).\(m\).\(s\). values of voltage and current are respectively.

1 \(141.4\,V,141.4\,A\)
2 \(141.4\,V,141.4\,mA\)
3 \(70.7\,V,70.7A\)
4 \(70.7\,V,70.7mA\)