A cricket ball is thrown by a player at a speed of 20 m/s in a direction 30° above the horizontal. The maximum height attained by the ball during its motion is: (g = 10 m/s2)
1.  5 m
2.  10 m
3.  20 m
4.  25 m

Subtopic:  Projectile Motion |
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A closely packed coil having 1000 turns has an average radius of 62.8 cm. If current carried by the wire of the coil is 1 A, the value of magnetic field produced at the centre of the coil will be:
(permeability of free space = 4\(\pi\) × 10-7 H/m) nearly:
1.  10-1 T
2.  10-2 T
3.  102 T
4.  10-3 T
Subtopic:  Magnetic Field due to various cases |
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An inductor of inductance 2 mH is connected to a 220 V, 50 Hz ac source. Let the inductive reactance in the circuit is X1. If a 220 V dc source replaces the ac source in the circuit, then the inductive reactance in the circuit is X2. X1 and X2 , respectively, are:
1.  6.28 \(\Omega\), zero
2.  6.28 \(\Omega\), infinity
3.  0.628 \(\Omega\), zero
4.  0.628 \(\Omega\), infinity
Subtopic:  Different Types of AC Circuits |
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During a cloudy day, a primary and a secondary rainbow may be created. Which of the following statement is correct?
1. primary rainbow is due to double internal reflection and is formed above the secondary one.
2. primary rainbow is due to double internal reflection and is formed below the secondary one.
3. secondary rainbow is due to double internal reflection and is formed above the primary one.
4. secondary rainbow is due to a single internal reflection and is formed above the primary one.
Subtopic:  Total Internal Reflection |
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The light rays having photons of energy 4.2 eV are falling on a metal surface having a work function of 2.2 eV. The stopping potential of the surface is:
1.  2 eV
2.  2 V
3.  1.1 V
4.  6.4 V
Subtopic:  Einstein's Photoelectric Equation |
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In the diagram shown, the normal reaction force between 2 kg and 1 kg is (Consider the surface to be smooth):
Given g = 10 ms-2
           
1.  25 N
2.  39 N
3.  6 N
4.  10 N
Subtopic:  Tension & Normal Reaction |
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Identify the equivalent logic gate represented by the circuit given above:
       
1. OR
2. NOR
3. AND
4. NAND
Subtopic:  Logic gates |
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Two copper vessels A and B have the same base area but are of different shapes. A takes twice the volume of water as that B requires to fill upto a particular common height. Then the correct statement among the following is:
1.  Pressure on the base area of vessels A and B is same.
2.  Pressure on the base area of vessels A and B is not same.
3.  Both vessels A and B weigh the same.
4.  Vessel B weighs twice that of A.
Subtopic:  Pressure |
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The distance between the two plates of a parallel plate capacitor is doubled and the area of each plate is halved. If C is its initial capacitance, its final capacitance is equal to:
1.  2C
2.  C/2
3.  4C
4.  C/4
Subtopic:  Capacitance |
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The terminal velocity of a copper ball of radius 5 mm falling through a tank of oil at room temperature is 10 cm s-1. If the viscosity of oil at room temperature is 0.9 kg m-1 s-1, the viscous drag force is:
1. 8.48 × 10-3 N
2. 8.48 × 10-5 N
3. 4.23 × 10-3 N
4. 4.23 × 10-6 N
Subtopic:  Stokes' Law |
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