Which of the following acts as a circuit protection device ?
In the circuit shown below , the readings of the voltmeter and the ammenter will be :
Six similar bulbs are connected as shown in the figure with a DC source of emf E , and zero internal resistance .
The ratio of power consumption by the bulbs when 1) all are glowing and 2 ) in the situation when two from section A and one from section B are glowing will be :
9 : 4
1 : 2
2 : 1
Current sensitivity of a moving coil galvanometer is 5 div/mA and its voltage sensitivity (angular deflection per unit voltage applied) is 20 div/V. The resistance of the galvanometer is
The potential difference (VA - VB) between the points A and B in the given figure is
A filament bulb (500 W, 100 V) is to be used in a 230 V main supply. When a resistance R is connected in series, it works perfectly and the bulb consumes 500 W. The value of R