Physics Work,Power & Energy Level: High School
A 88.96 N collar slides without friction along a vertical rod as shown in the figure at “click here” . A spring (k = 525.4 N/m) attached to the collar is not stretched when it is located at position A (the distance between the posts is 10.16 cm ) . The collar is released from rest at position A which is 20.40 m above the floor , Determine the collar’s speed after it has moved 15.24 cm down the rod to position B.
Physics Work,Power & Energy Level: High School
A 200 kg roller coaster starts from rest at point A and begins to coast down the track . the track distance from point A to point B is 50 m and the track distance from point B to point C is 30 m . There is a constant retarding friction force of 15N along the track distance from point A to point C. Determine the speed V of the car at point B and C .
Physics Current Electricity Level: High School
What is the current in the 5 ohm resistor in the circuit shown at “click here” ?
Physics Current Electricity Level: High School
Four 20 ohm resistors are connected in parallel and the combination is connected to a 20 V emf device . What is the current in the device ?
Physics Current Electricity Level: High School
A current of 0.3 A is passes through a lamp for 2 minutes using a 6 V power supply . What is the electrical energy dissipated by this lamp during the 2 minutes ?= 6 x 0.3 (2 x 60) = 216 J
Physics Current Electricity Level: High School
The mechanical equivalent of heat is 1cal = 4.18 J. A heating coil , connected to a 120 V source , provides 60000 calories in 10 minutes . What is the current in the coil ?
Physics Current Electricity Level: High School
Supposed the electrical company charges 10 cents per kWh. How much does it cost to use a 125W lamp 4 hours a day for 3 days ?
Physics Current Electricity Level: High School
A certain resistor dissipates electrical energy at a rate of 0.5 W when connected to a 3V potential difference . When connected to a 1V potential difference , the rate of electrical energy dissipates is ?
Physics Current Electricity Level: High School
A student kept her 60 watt , 120 volt study lamp turned on from 2 PM until 2 AM , What is the charge that went through it was ?
Physics Current Electricity Level: High School
A certain sample carries a current of 4A when the potential difference is 2V and a current of 10A when the potential difference is 4V . this sample has a resistance of 0.5 ohm at 1V. Please show the work .
Physics Current Electricity Level: High School
A nichrome wire is 1m long and 1 x 10^-6 m^2 in cross-sectional area . When connected to a potential difference of 2V , a current of 4A exists in the wire. What is the resistivity of this nichrome ?
Physics Current Electricity Level: High School
A 10 ohm resistor has a constant current . If 1200 C of charge flow through it in 4 minutes what is the value of the current ?
Physics Electrostatics Level: High School
The work on joules required ot carry a 6.0 C charge from a 5.0 V equipotential surface to a 6.0 V equipotential surface and back again to the 5.0 V surface is ?Physics Electrostatics Level: High School
During a lightning discharge, 30 C of charge move through a potential difference of 1.0 x 10^8 V in 2.0 x 10^-2 s . What is the energy released by the lightning bolt ?
Physics Electrostatics Level: High School
The potential difference between two points is 100 V . If 2 C is transported from one of these points to the other . What is the magnitude of the work done ?