6. Joule’s Law equation H = ?
(a) IR2 t / 4.2
(b) 4.2 / IR2 t
(c) IRt2 / 4.2
(d) I2 Rt / 4.2
Explanation
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7. Ampere is :
(a) coulomb sec
(b) volt/sec
(c) coulomb/meter
(d) coulomb/sec
Explanation
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8. Work done in carrying a charge Q through a potential V is :
(a) QV
(b) Q/V
(c) V/Q
(d) I/V
Explanation
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9. Which device can convert all electrical energy into heat.
(a) radiator
(b) converter
(c) generator
(d) resistor
Explanation
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10. The frequency of the domestic power supply is of the order of :
(a) 220 Hz
(b) 50 Hz
(c) 100 Hz
(d) 150Hz
Explanation
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