The transfer ratio β of a transistor is 50. The input resistance of the transistor, when used in the common emitter mode is 1kΩ. The peak value of the collector alternating current for an input peak voltage of 0.01 V is
Four resistance are connected so that they form the side of a rectangle AB, BC, CD and DA respectively. Another resistance of is connected across the diagonal AC. The equivalent resistance between A and B is
1. 2Ω 2. 5Ω 3. 7Ω 4. 10Ω
Subtopic: Combination of Resistors |
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A rod of length L is hinged from one end. It is brought to a horizontal position and released. The angular velocity of the rod, when it is in vertical position is
A weight w is suspended from the midpoint of a rope, whose ends are at the same level. In other to make the rope perfectly horizontal, the force applied to each of its ends must be
1. less than w 2. equal to w 3. equal to 2 w 4. infinitely large
Subtopic: Application of Laws |
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A block has been placed on an inclined plane with the slope angle θ, block slide down the plane at constant speed. The coefficient of kinetic friction is equal to
1. sin θ 2. cos θ 3. g 4. tan θ
Subtopic: Friction |
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During SHM, a particle has displacement x from mean position. If acceleration. Kinetic energy and excess potential energy are represented by a K and U respectively, then choose the appropriate graph