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Q. No.An AC source producing emf
ε = ε0 [cos(100 π s–1)t + cos(500 π s–1)t]
is connected in series with a capacitor and a resistor. The steady-state current in the circuit is found to be
i = i1 cos [(100 π s–1)t +ϕ1] i2 cos[(500 π s–1)t + φ2]
1. i1 > i2
2. i1 = i2
3. i1 < i2
4. the information is insufficient to find the relation between i1 and i2
ε = ε0 [cos(100 π s–1)t + cos(500 π s–1)t]
is connected in series with a capacitor and a resistor. The steady-state current in the circuit is found to be
i = i1 cos [(100 π s–1)t +ϕ1] i2 cos[(500 π s–1)t + φ2]
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe peak voltage in a 220 V AC source is
1. 220 V
2. about 160 V
3. about 310 V
4. 440 V
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn AC source is rated 220 V, 50 Hz. The average voltage is calculated in a time interval of 0.01 s. It
1. must be zero
2. may be zero
3. is never zero
4. is (220\(\sqrt2\) ) V
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. 20 Hz
2. 50 Hz
3. 200 Hz
4. 500 Hz
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
Correct option:
1. a
2. b
3. c
4. d
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA series AC circuit has a resistance of 4 Ω and a reactance of 3. Ω. The impedance of the circuit is
1. 5 Ω
2. 7 Ω
3. 12/7 Ω
4. 7/12 Ω
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTransformers are used
1. in DC circuits only
2. in AC circuits only
3. in both DC and AC circuits
4. neither in DC nor in AC circuits
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn alternating current is given by
i – i1 cos ωt + i2 sin ωt
The rms current is given by
1. \(\frac{i_{1}+i_{2}}{\sqrt{2}}\)
2. \(\frac{\left|i_{1}+i_{2}\right|}{\sqrt{2}}\)
3. \(\sqrt{\frac{i_{1}^{2}+i_{2}^{2}}{2}}\)
4. \(\sqrt{\frac{i_{1}^{2}+i_{2}^{2}}{\sqrt{2}}}\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn alternating current having peak value 14 A is used to heat a metal wire. To produce the same heating effect, a constant current i can be used where i is
1. 14 A
2. about 20 A
3. 7 A
4. about 10 A
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA constant current of 2.8 A exists in a resistor. The RMS current is
1. 2.8 A
2. about 2 A
3. 1.4 A
4. undefined for a direct current
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect Chapter Topics:
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