Q. The device used to generate electric current is called
The correct answer was: Generator
Q. The image created by a plane mirror
The correct answer was: Will be the same size as the object
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. The magnetic field of a current-carrying solenoid is similar to _____.
The correct answer was: A bar magnet
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. Which of the following phenomena cannot be explained with the concept that light always travels in a straight line?
The correct answer was: Diffraction
Q. Which of the following is not a traditional source of energy?
The correct answer was: Nuclear energy
Q. The safety device used for circuit protection from short circuits is
The correct answer was: A fuse
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. During a short circuit, the electric current in the circuit
The correct answer was: Greatly increases
Q. Which of the following is a non-traditional source of energy?
The correct answer was: Solar energy
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. If the magnification m = +1.5, then
The correct answer was: The size of the image > the size of the object, real image
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. To obtain a powerful parallel beam of light in vehicle headlights, _____ is used.
The correct answer was: Concave 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. 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. 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. 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. The direction of electric current is taken as
The correct answer was: Opposite to the direction of electron flow
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