Q. The device used to generate electric current is called
The correct answer was: Generator
Q. Where should an object be placed to obtain a virtual image through a concave mirror?
The correct answer was: Between the principal focus and the pole
Q. An object placed at an infinite distance creates a clear and bright image on a screen placed at a distance ‘x’ from a concave mirror. Then ‘x’ is equal to
The correct answer was: The focal length of the mirror
Q. What will be the nature of the image obtained from the outer raised surface of a spoon, and which type of mirror can it be considered close to?
The correct answer was: Upright and convex mirror
Q. The AC supply in homes is 220 V, 50 Hz. One of the supply wires has red insulation, which is called
The correct answer was: Live wire
Q. The image created by a plane mirror
The correct answer was: Will be the same size as the object
Q. During a short circuit, the electric current in the circuit
The correct answer was: Greatly increases
Q. The safety device used for circuit protection from short circuits is
The correct answer was: A fuse
Q. Which of the following is a non-traditional source of energy?
The correct answer was: Solar energy
Q. The direction of electric current is taken as
The correct answer was: Opposite to the direction of electron flow
Q. The phenomenon of electromagnetic induction is
The correct answer was: Generating induced electric current in a coil due to relative motion between a magnet and the coil
Q. A pencil partially submerged in water appears to be displaced at the air-water interface; what is this due to?
The correct answer was: Reflection
Q. To obtain a powerful parallel beam of light in vehicle headlights, _____ is used.
The correct answer was: Concave mirror
Q. Which of the following is not a traditional source of energy?
The correct answer was: Nuclear energy
Q. If the magnification m = +1.5, then
The correct answer was: The size of the image > the size of the object, real image
Q. A piece of wire with resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R’, what is the ratio of R/R’?
The correct answer was: 25
Q. The magnetic field of a current-carrying solenoid is similar to _____.
The correct answer was: A bar magnet
Q. Choose the correct option regarding the nature and distance of the image formed by a plane mirror.
The correct answer was: Virtual, upright, and at the same distance as the object behind the plane mirror
Q. What type of mirror is used to always obtain a virtual and upright image?
The correct answer was: A) and B) both
Q. Which of the following phenomena cannot be explained with the concept that light always travels in a straight line?
The correct answer was: Diffraction
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