Engineering Board Exam Reviewer · Physics · medium
A wire 0.2 m long carries a current of 10 A perpendicular to a uniform magnetic field of 0.5 T. What is the force on the wire?
- 25 N
- 100 N
- 0.01 N
- 1.0 N
Answer
D. 1.0 N
Solution
F = BIL = 0.5(10)(0.2)(1) = 1.0 N.
More Physics questions
- A battery has an emf of 12 V and an internal resistance of 0.5 . What is the maximum power it can deliver to an external load?
- A battery with an emf of 12 V and an internal resistance of 0.5 delivers a current of 2 A. What is its terminal voltage?
- A capacitor is charged through a resistor from a 12 V source. What is the capacitor voltage after one time constant?
- What is the time constant of an RC circuit with R = 10 k and C = 100 F?
- A parallel-plate capacitor in air has plates of area 0.01 m2 separated by 1 mm. What is its capacitance? ( 0 = 8.85 × 10-12 F/m)
- How much energy is stored in a 10 F capacitor charged to 12 V?
- What is the equivalent capacitance of 4 F and 6 F capacitors connected in series?
- A 1.5 kW air conditioner runs 4 hours a day for 30 days. At ₱11 per kWh, what is the monthly cost?
- A 1.5 kW electric heater is used for 2 hours. How much energy does it consume?
- A copper wire has a resistance of 10 at 20 °C. What is its resistance at 80 ° C? ( = 0.0039 /° C)