CBSE Class 12
CBSE Class 12 Physics
An astronomical telescope uses two lenses of power 10 D and ID. What is its magnifying power in normal adjustment?
(1)
The objective of an astronomical telescope
(2)
How is the working of telescope different
(2)
Calculate the value of R in the balance condition of the Wheatstone bridge
(2)
Write two possible causes for one sided deflection in a potentiometer experiment
(1)
Why are the connections between the resistors in a meter bridge made of thick copper strips?
(2)
Determine the current in each branch of the following network
(2)
AB is a potentiometer wire as shown in figure
(2)
In the meter bridge experiment, the balance point
(2)
Six lead-acid type of secondary cells each of emf 2 V
(2)
Write any two factors on which internal resistance of a cell depends
(2)
First a set of n equal resistors of R
(2)
When is more power delivered to a light bulb
(2)
Power P is to be delivered to a device via transmission cables
(2)
Write two characteristics of manganin which make it suitable for making standard resistances
(1)
Two conductors are made of the same material
(2)
A conductor of length l
(2)
What conclusion can you draw
(2)
A galvanometer coil has a resistance of 12 Q
(2)
A rectangular coil of area 2 x ${{10}^{4}}$ ${{m}^{2}}$ and 40 turns
(2)
What is the magnitude of magnetic force per unit length
(2)
Find the force exerted at point 02 because of the wire along the X-axis
(2)
Using Ampere’s circuital law, derive the expression
(2)
A proton is travelling with horizontal velocity
(2)
A uniform magnetic field Bis set up along the positive X-axis
(2)
A circular coil of 20 turns and radius 10 cm
(2)
Answer the following questions given
(2)
Suggest some appropriate design particulars of a solenoid
(2)
Explain how Biot-Savart’s law
(2)
A point charge is moving with a constant velocity perpendicular
(2)
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