12 Questions
What is the final image in an astronomical telescope?
Real and inverted
Why can't alternating current be measured by a DC ammeter?
AC changes direction
What happens to the width of the forbidden gap with an increase in temperature?
Decreases
What is the kinetic energy of an electron accelerated in a potential difference of 100V?
1.6 # 10-17 J
What is the formula to calculate the total electric charge Q that passes any point in a circuit during time Tt?
Q = Tφ Tt
How do you calculate the equivalent capacitance of an infinite number of capacitors in parallel combination?
4 µF
In an electric circuit, what is the formula for power consumption?
V 2 R
Explain the concept of work done in moving a test charge between two points in an electric field.
Work done is equal to the difference in potential energy between the two points, and can be calculated using the formula W = q(V2 - V1).
According to Faraday's laws of electromagnetic induction, what is the relationship between the induced electromotive force (emf) and the rate of change of magnetic flux?
emf = -N dΦ/dt
Describe the factors affecting the magnetic field produced by a solenoid.
The factors affecting the magnetic field produced by a solenoid include the number of turns per unit length (n) and the current flowing through it (I).
Differentiate between ferromagnetic and paramagnetic substances based on their magnetic properties.
Ferromagnetic substances have permanent magnetic moments even in the absence of an external magnetic field, while paramagnetic substances are weakly attracted to magnetic fields.
Explain the concept of phase difference in alternating current (A.C.) circuits.
Phase difference in A.C. circuits refers to the relative shift in timing between two alternating quantities such as voltage and current.
Test your knowledge of physics concepts with this CBSE Class 12 sample paper quiz. Questions cover topics like current, voltage, power, and magnetic lines of force. Practice and improve your understanding of important physics principles.
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