Physics-
General
Easy
Question
The net emf and internal resistance of three batteries as shown in figure is :
The correct answer is:
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if 
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if then find y in the given figure.
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find x y
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In the figure, the potentiometer wire AB of length L and resistance 9r is joined to the cell D of emf e and internal resistance r. The cell C's emf is 
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By error, a student places moving–coil voltmeter V (nearly ideal) in series with the resistance in a circuit in order to read the current, as shown. The voltmeter reading will be
By error, a student places moving–coil voltmeter V (nearly ideal) in series with the resistance in a circuit in order to read the current, as shown. The voltmeter reading will be
physics-General
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In the figure shown the power generated in y is maximum when 
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A battery of internal resistance 4W is connected to the network of resistance as shown. In order that the maximum power can be delivered to the network, the value of R in W should be :–
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physics-General
chemistry-
Identify the functional groups in the following compound.
Identify the functional groups in the following compound.
chemistry-General
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Three 60W, 120V light bulbs are connected across a 120 V power source. If resistance of each bulb does not change with current then find out total power delivered to the three bulbs.
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For natural numbers m,n if 
and 
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For natural numbers m,n if and then (m,n) is
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In the circuit shown the capacitor of capacitance C is initially uncharged. Now the capacitor is connected in the circuit as shown. The charge passed through an imaginary circular loop parallel to the plates (also circular) and having the area equal to half of the area of the plates, in one time constant is:
In the circuit shown the capacitor of capacitance C is initially uncharged. Now the capacitor is connected in the circuit as shown. The charge passed through an imaginary circular loop parallel to the plates (also circular) and having the area equal to half of the area of the plates, in one time constant is:
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is divisible by_____ in N
is divisible by_____ in N
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A potential divider is used to give outputs of 2V and 3V from a 5V source, as shown in figure. Which combination of resistances, R1 , R2 and R3 gives the correct voltages?
A potential divider is used to give outputs of 2V and 3V from a 5V source, as shown in figure. Which combination of resistances, R1 , R2 and R3 gives the correct voltages?
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A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of 
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A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of , the reading of the spring balance will be-
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A light spring balance hangs from the hook of the other light spring balance and a block of mass M kg hangs from the former one. Then the true statement about the scale reading is-
A light spring balance hangs from the hook of the other light spring balance and a block of mass M kg hangs from the former one. Then the true statement about the scale reading is-
physics-General
