Logic puzzles, riddles, math puzzles and brainteasers - pzzls.com

Vandaag is het 17 July 2018

Add using:

Voltage voodoo - science puzzle

Difficulty: 

   Rating: 3.1/5.0

Share this pzzl:  

In the figure, an electrical circuit is drawn. In the middle of the circuit a infinitely long metal bar is placed indicated with the grey circle. In this bar, an oscillating magnetic field is induced by a coil which is attached somewhere to the bar. Two resistors are located in the circuit with values R1 and R2. The alternating voltages V1 and V2 are being measured with two perfect alternating voltages meters.

What is the relation between the two voltages V1 and V2?
a) V1 : V2 = R2 : R1
b) V1 : V2 = 1 : 1
c) V1 : V2 = R1 : R2
d) V1 = V2 = 0
e) something different.
spanningsbron

Einstein as a speed devil - science puzzle

Difficulty: 

   Rating: 3.1/5.0

Share this pzzl:  

How fast should you drive towards a red traffic light to see it appear as green? traffic light

Matches - logic puzzle

Difficulty: 

   Rating: 3.1/5.0

Share this pzzl:  

matches
Suppose you have five matches. How can you form the number sixteen with them?