In the figure, a carbon resistor has bands of different colours on its body as shown. The value of the resistance is:
1. 2.2 k
2. 3.3 k
3. 5.6 k
4. 9.1 k
A light bulb, a capacitor and a battery are connected together as shown below with the switch S initially open. When the switch S is closed, which one of the following is true?
1. The bulb will light up for an instant when
the capacitor starts charging.
2. The bulb will light up when
the capacitor is fully charged.
3. The bulb will not light up at all.
4. The bulb will light up and go off at regular intervals.
In the given figure each plate of capacitance C has partial value of charge equal to:
1. CE
2.
3.
4.
A 4 μF capacitor and a resistance of 2.5 MΩ are in series with a 12 V battery. The time after which the potential difference across the capacitor is 3 times the potential difference across the resistor is: [Given ln(2)= 0.693]
1. 13.86 s
2. 6.93 s
3. 7 s
4. 14 s
A carbon resistor (47 ± 4.7) kΩ is to be marked with rings of different colours for its identification. The colour code sequence will be:
1. Violet - Yellow - Orange - Silver
2. Yellow - Violet - Orange - Silver
3. Yellow - Green - Violet - Gold
4. Green - Orange - Violet - Gold
In the figure below, what is the potential difference between the point A and B and between B and C, respectively, in steady state?
1.
2.
3.
4.
When the key K is pressed at time t = 0, which of the following statement about the current I in the resistor AB of the given circuit is true?
1. | I = 2 mA at all t |
2. | I oscillates between 1 mA and 2 mA |
3. | I = 1 mA at all t |
4. | At t = 0 , I = 2 mA and with time, it goes to 1 mA |
The colour code of resistance is given below:
The values of resistance and tolerance, respectively are:
1. 47 k, 10%
2. 4.7 k, 5%
3. 470 , 5%
4. 470 k, 5%
A capacitor of 4 is connected as shown in the circuit. The internal resistance of the battery is 0.5 . The amount of charge on the capacitor plates will be:
1. 0
2. 4
3. 16
4. 8
Consider a capacitor-charging circuit. Let Q1 be the charge given to the capacitor in a time interval of 10 ms and Q2 be the charge given in the next time interval of 10 ms. Let 10 µC charge be deposited in a time interval J, and the next 10 µC charge is deposited in the next time interval t2
1. Q1 > Q2 , t1 > t2
2. Q1 > Q2 , t1 < t2
3. Q1 < Q2 , t1 > t2
4. Q1 < Q2 , t1 < t2