A cell of emf E and internal resistance r supplies current for the same time t through external resistance R₁ and R₂ seperately. If the heat developed in both the cases is the same, then […]
A galvanometer of 50 Ω resistance has 25 divisions. A current of 4×10⁻⁴ A gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 volt, it should […]
A carbon film resistor has colour code green, black, violet, gold. The value of the resistor is
Options
(a) 50Ω (b) 500Ω (c) 500±5%MΩ (d) 500±10%Ω
Correct Answer:
500±5%MΩ
Explanation:
No explanation available. […]
A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively with and being short circuited through a resistance of 10Ω. Its internal resistance is
Options
(a) 2.0 ohm […]
24 cells of emf 1.5 V each having internal resistance of 1 ohm are connected to an external resistance of 1.5 ohms. To get maximum current,
Options
(a) all cells are connected in […]
A thin wire of resistance 4 ohm is bent to form a circle. The resistance across any diameter is
Options
(a) 4 ohm (b) 2 ohm (c) 1 ohm (d) 8 ohm
Correct […]
The resistance of a wire is 5 ohm at 50° C and 6 ohm at 100° C. The resistance of the wire at 0° C will be
Options
(a) 3 ohm (b) 2 […]
The fluctuation in the input voltage of 200 V to a domestic circuit is +10 V. The power fluctuation will be
Options
(a) 5% (b) 10% (c) 20% (d) 40%
Correct Answer:
10%
In a circuit, 5% of total current passes through a galvanometer. If resistance of the galvanometer is G, the value of the shunt is
Options
(a) 19 G (b) 20 G (c) G […]
Three cells, each of e.m.f 1.5 V and internal resistance 1 ohm are connected in parallel. What would be the e.m.f of the combination
Options
(a) 4.5 V (b) 1.5 V (c) 3.0 […]
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