Which of the following quantities consists of SI unit as WATT ? A. Force B. Charge C. Current D. Power The SI unit of power is the watt and it is discover by the Scottish Engineer James Watt. Power is…
Which of the following has no units? A. Permeability B. Moment of a magnet C. Magnetic susceptibility D Permittivity Magnetic susceptibility is the degree to which a material is magnetized by an external magnetic field, hence in the SI system…
Which quantity consists of a unit 1KWh ? A. Energy B. Time C. Power D. Charge 1 kWh is the amount of energy used by a 1 kW (1000 watt) resistance for 1 hour. Energy = Power × Time.
Which quantity should be measured by the voltmeter ? A. Current B. Voltage C. Power D. Speed Voltmeter is a high resistance device used for measuring potential difference or voltage. It must be connected in parallel for measurement
Internal resistance of ideal current source is ? A. zero B. infinite C. finite B. 100 ohms Ideal current source delivers energy at specified current, which is independent on voltage across the load. The internal resistance must become very high…
Internal resistance of ideal voltage source is ? A. zero B. infinite C. finite D. 100 ohms Internal resistance of ideal voltage source is
Capacitor does not allow the sudden change of ? A. current B. voltage C. power D. None of the above The expression of current through a capacitor is For sudden change of voltage infinite current is required. But practically it…
Inductor does not allow the sudden change of A. current B. voltage C. power D. None of the above Voltage developed across an inductor is expressed bY Sudden change of current means di will change at dt → 0 (dt…
Power dissipation in ideal inductor is A. Maximum B. Minimum C. Zero D. A finite value Internal resistance of ideal inductor is zero. As there is no resistance, there should not be any dissipation of power. Pure inductor has no…
Which of the following are the passive elements? A. Resistor B. Bulb C. Both D. None of these. When the element is not capable of delivering energy independently, are called as passive element. Both resistor and bulb are the passive…