Sine Waves, Different Meters, and AC generation

Multiple Select

What are the 3 effects of a electrical circuit

• Chemical

• Resistance

• Magnetic

• Thermal

Multiple Choice

If a car accelerates from a velocity of 3m/s to 15m/s in four seconds, calculate its average acceleration.

• 3 m/s²
• 5 m/s²
• 4 m/s²
• 2 m/s²

Multiple Choice

What work must be done to lift a 200kg bundle of conduit from the floor on to a rack 2m high?

• 3924 J
• 5000 J
• 2500 J
• 1500 J

Multiple Choice

An EMF of 10 volts is applied to a resistance of 20Ω. Calculate the current that will flow.

• 0.5A
• 0.2A
• 5A

• 2A

Multiple Choice

Calculate the resistance based on the figures in the photo

• 15Ω

• 18Ω

• 21Ω

• 12.50Ω

Multiple Choice

If a cable has a resistance of 0.15W/m what will be the resistance of 320m of the same cable?

• 16 ohms
• 64 ohms
• 48 ohms
• 32 ohms

Multiple Choice

Calculate the total resistance of a parallel circuit if: R1 = 9Ω, R2 = 12Ω and R3 = 18Ω.

• 3Ω
• 4Ω
• 6Ω
• 10Ω

Multiple Choice

Calculate the total resistance of a parallel circuit if R1 = 45Ω, R2 = 90Ω and R3 = 30Ω

• 90Ω
• 45Ω
• 30Ω
• 15Ω

Multiple Choice

A conductor of 20cm in length is situated perpendicularly in a magnetic field of flux density of 5 Tesla's and has a current of 10A flowing through it. Calculate the force on the conductor.

• 10 N
• 20 N
• 15 N
• 5 N

Multiple Choice

A crowbar is used to lift a packing case. The load exerted by the packing case is 1,200N. Determine the effort needed to lift the packing case if the load is 10cm from the pivot and the effort is 1.0m from the pivot.

• 60N
• 120N
• 240N
• 300N