Options:
- A. shunt value decreases
- B. shunt value increases
- C. shunt value remains the same
- D. none of the above
View Answer
A. shunt value decreases
Physics
A sensitive galvanometer gives full-scale deflection with 100 mV. If the resistance of the galvanometer is 50? the maximum current that can flow through safely is__________________?
Options:
- A. 2.0 mA
- B. 20 mA
- C. 200 mA
- D. 0.2 mA
View Answer
A. 2.0 mA
Coil of a galvanometer is suspended in a radial magnetic field so that the deflecting torque on the coil is always___________________?
Options:
- A. BINA cosa
- B. BINA sina
- C. BINA tana
- D. BINA
View Answer
D. BINA
A galvanometer basically is an instrument used to ____________________?
Options:
- A. detect current in a circuit
- B. measure current flowing through a circuit
- C. measure voltage across a circuit
- D. measure potential difference between two points in a circuit
View Answer
A. detect current in a circuit
A wheat stone bridge is said to be balanced when____________________?
Options:
- A. maximum current flows through the galvanometer branch
- B. minimum current flows through the galvanometer branch
- C. potential difference across galvanometer branch is maximum
- D. potential difference across galvanometer branch is zero
View Answer
D. potential difference across galvanometer branch is zero
A particle of mass m charge q and speed V enters a uniform magnetic radius r. The radius r of the circle is_________________?
Options:
- A. independent mass m
- B. directly proportional to m
- C. directly proportional to q
- D. directly proportional to B
View Answer
D. directly proportional to B
If a current carrying solenoid is suspended freely it will__________________?
Options:
- A. be rotating
- B. come to rest in N-S direction
- C. vibrating like galvanometer needle
- D. comes to rest after rotation
View Answer
B. come to rest in N-S direction
A current carrying conductor is placed in a uniform magnetic field parallel to it. The magnetic force experienced by the conductor is _____________________?
Options:
- A. F=1/B
- B. F=1/Bsin?
- C. F/0
- D. F=1/Bcos?
View Answer
C. F/0
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___________________?
Options:
- A. R=qB/mV
- B. R=mV/qB
- C. R=qmV/B
- D. R=qmB/V
View Answer
B. R=mV/qB
A magnetic compass will be deflected if it is kept near a____________________?
Options:
- A. charge in motion
- B. charge at rest
- C. both
- D. none
View Answer
A. charge in motion