A. More heat is produced in a thick wire
B. More heat is produced in a thin wire
C. No heat is produced in the wire
D. Less heat is produced in a thick wire
β
The correct answer is option B.
Physics MCQs
Prepare effectively with our Physics MCQs with answers and explanations for exams and job tests. Our collection covers key topics such as mechanics, thermodynamics, optics, electricity and magnetism, modern physics, waves, and quantum theory. These multiple-choice questions are designed for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, CSS, PMS, university entry tests, and physics-related job assessments. Practice online to strengthen your concepts, improve problem-solving skills, and excel in exams with our updated Physics MCQs
152. A current carrying conductor is placed in a uniform magnetic field parallel to it. The magnetic force experienced by the conductor is
A. F=1/B
B. F=1/BsinΞΈ
C. F/0
D. F=1/BcosΞΈ
β
The correct answer is option C.
153. Electromagnetic waves emitted from antenna are
A. Stationary
B. Longitudinal
C. Transverse
D. All the above
β
The correct answer is option C.
154. Three equal resistors connected in series with a source of emf together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of emf?
A. 40 W
B. 90W
C. 100W
D. 120W
β
The correct answer is option B.
155. What is the value of the current in a wire of 10cm long at the right angle to a uniform magnetic field of 0.5 Weber/m2 when the force acting on the wire is 5N?
A. 1A
B. 10A
C. 100A
D. 1000A
β
The correct answer is option C.
156. Natural or resonant frequency of an LC circuit is
A. f0=Ο0/2Ο=1/2ΟβLC
B. Ο=Ο0=1/βLC
C. 1000 Hz
D. 100 Hz
β
The correct answer is option D.
157. One kilowatt-hour is the amount of energy delivered during
A. One second
B. One day
C. One minute
D. One hour
β
The correct answer is option D.
158. When a particle of charge q and mass m enters into a uniform magnetic field B moving with a velocity v perpendicular to the direction for the field it describes a circular path of radius
A. R=qB/mV
B. R=mV/qB
C. R=qmV/B
D. R=qmB/V
β
The correct answer is option B.
159. The waves that require a material medium for their propagation are called
A. Matter waves
B. Electromagnetic waves
C. Carrier waves
D. Mechanical waves
β
The correct answer is option D.
160. The Fahrenheit and centigrade scales agree to
A. 40
B. 15.5
C. 542
D. 273
β
The correct answer is option A.