Physics Model Question Paper 4

A and B are two infinitely long straight parallel conductors. C is another straight conductor of length 1 m kept parallel to A and B as shown in the figure. Then the force experienced by C is
1. towards B equal to 0.6 ´ 10-5 N
2. towards A equal to 5.4 ´ 10-5 N
3. towards B equal to 5.4 ´ 10-5 N
4. towards A equal to 0.6 ´ 10-5 N
A parallel plate capacitor with air as the dielectric has capacitance C. A slab of dielectric constant K and having the same thickness as the separation between the plates is introduced so as to fill one-fourth of the capacitor as shown in the figure. The new capacitance will be
If power dissipated in the 9 W resistor in the circuit shown is 36 Watt, the potential difference across the 2 Wresistor is
1. 2 Volt
2. 4 Volt
3. 8 Volt
4. 10 Volt
In the Wheatstone's network given below, P = 10 W, Q = 20W, R = 15 W, S = 30W The current passing through the battery (of negligible internal resistance) is
1. 0.72 A
2. 0.18 A
3. 0 A
4. 0.36 A
Symbolic representation of four logic gates are shown as

Pick out which ones are for AND, NAND and NOT gates, respectively:
1. (ii), (iv) and (iii)
2. (ii), (iii) and (iv)
3. (iii), (ii) and (i)
4. (iii), (ii) and (iv)
The current passing through the ideal ammeter in the circuit given below is
1. 0.5 A
2. 0.75 A
3. 1 A
4. 1.25 A
Three long straight wires A, B and C are carrying currents as shown in figure. Then the resultant force on B is directed _______.
1. towards A
2. towards C.
3. perpendicular to the plane of paper and outward.
4. perpendicular to the plane of paper and inward.
Two identical rods AC and CB made of two different metals having thermal conductivities in the ratio 2 : 3 are kept in contact with each other at the end C as shown in the figure. A is at 100°C and B is at 25°C. Then the junction C is at
1. 50°C
2. 75°C
3. 60°C
4. 55°C
Which one of the following graphs represents the variation of maximum kinetic energy (EK) of the emitted electrons with frequency g in photoelectric effect correctly?
1. 1
2. 2
3. 3
4. 4
Effective capacitance between A and B in the figure shown is (all capacitances are in µ F)
1. 21 µ F
2. 23 µ F
3. µ F
4. µ F

Physics Model Question Paper 4

Quiz