Physics-
General
Easy
Question
If the system in the figure is released from rest in the configuration shown, find the velocity of the block Q after it has fallen through a distance 10 meters, given mass of 
- 8 m/sec
- 8.85 m/sec
- 9.5 m/sec
- 10 m/sec
The correct answer is: 8.85 m/sec
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A bob is suspended from a crane by a cable of length 
The crane and load are moving at a constant speed 
The crane is stopped by a bumper and the bob on the cable swings out an angle of 
The initial speed 
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A bob is suspended from a crane by a cable of length The crane and load are moving at a constant speed The crane is stopped by a bumper and the bob on the cable swings out an angle of The initial speed is
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A rocket is fired and ascends with constant vertical acceleration of 10m/s2 for 1 minute Its fuel is exhausted and it continues as a free particle The maximum altitude reached is (
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At time t = 0, terminal A in the circuit shown in the figure is connected to B by a key and an alternating current I(t) = I0 cos(
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and the battery is ideal with emf of 50 V, identify the correct statement(s).
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the key is switched from B to D. Now onwards only A and D are connected. A total charge Q flows from the battery to charge the capacitor fully. If C = 20 , R = 10 and the battery is ideal with emf of 50 V, identify the correct statement(s).
physics-General
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In the given circuit, the AC source has = 100 rad/s. considering the inductor and capacitor to be ideal, the correct choice(S) is(are)
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In an L–R series circuit, a sinusoidal voltage 
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In an L–R series circuit, a sinusoidal voltage is applied. It is given that L = 35 mH, R = 11, Vrms = 220 V, and = 22/7. Find the amplitude of current in the steady state and obtain the phase difference between the current and the voltage. Also plot the variation of current for one cycle on the given graph.
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When an AC source of emf 
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When an AC source of emf is connected across a circuit, the phase difference between the E and the current i in the circuit is observed to be , as shown in the diagram. If the circuit consists possibly only of R-C or R-L or L-C series, find the relationship between the two elements.
physics-General
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An LCR circuit is equivalent to a damped pendulum. In an LCR circuit the capacitor is charged to 
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If a student plots graphs of the square of maximum charge 
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An LCR circuit is equivalent to a damped pendulum. In an LCR circuit the capacitor is charged to and then connected to the L and R as shown below :
If a student plots graphs of the square of maximum charge on the capacitor with time (T) for two different values and of L then which of the following represents this graph correctly ? (Plots are shematic and not drawn to scale)
physics-General
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In the LCR circuit shown in figure unknown resistance and alternating voltage source are connected. When switch 'S' is closed then there is a phase difference of 
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Peak voltage of applied voltage sources is :
In the LCR circuit shown in figure unknown resistance and alternating voltage source are connected. When switch 'S' is closed then there is a phase difference of between current and applied voltage and voltage across resister is When switch is open current and applied voltage are in same phase. Neglecting resistance of connecting wire answer the following questions :
Peak voltage of applied voltage sources is :
physics-General
physics-
A voltage source V = 
sin (100 t) is connected to a black box in which there can be either one element out of L, C, R or any two of them connected in series
At steady state. the variation of current in the circuit and the source voltage are plotted together with time, using an oscilloscope, as shown
If AC source is removed, the circuit is shorted for some time so that capacitor is fully discharged and then a battery of constant EMF is connected across the black box, at t = 0. The current in the circuit will –
A voltage source V = sin (100 t) is connected to a black box in which there can be either one element out of L, C, R or any two of them connected in series
At steady state. the variation of current in the circuit and the source voltage are plotted together with time, using an oscilloscope, as shown
If AC source is removed, the circuit is shorted for some time so that capacitor is fully discharged and then a battery of constant EMF is connected across the black box, at t = 0. The current in the circuit will –
physics-General
physics-
A voltage source V = sin (100 t) is connected to a black box in which there can be either one element out of L, C, R or any two of them connected in series
At steady state. the variation of current in the circuit and the source voltage are plotted together with time, using an oscilloscope, as shown
Values of the parameters of the elements, present in the black box are –
A voltage source V = sin (100 t) is connected to a black box in which there can be either one element out of L, C, R or any two of them connected in series
At steady state. the variation of current in the circuit and the source voltage are plotted together with time, using an oscilloscope, as shown
Values of the parameters of the elements, present in the black box are –
physics-General
