Current Electricity - Study Mode

[#61] A 3 ohm resistor having 2 A current will dissipate the power of
Correct Answer

2 watts

Explanation

Solution: Explanation: The power dissipated by a resistor is given by the formula: ( P = I^2 imes R ) , where ( P ) = Power in watts, ( I ) = Current in amperes, ( R ) = Resistance in ohms. Given: Current, ( I = 2 , A ) Resistance, ( R = 3 , Omega ) Calculating power: ( P = (2)^2 imes 3 = 4 imes 3 = 12 , ext{watts} ) Hence, the power dissipated is 12 watts . Therefore, the correct answer is Option E: 12 watts .

[#62] Electric pressure is also called
Correct Answer

(C) Voltage

[#63] The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other?
Correct Answer

(B) 36 ohms

[#64] The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is
Correct Answer

(C) Positive

[#65] Voltage dependent resistors are used
Correct Answer

(B) To suppress surges