The circuit below shows two identical lamps and 4 closed switches. The options b
ID: 1630957 • Letter: T
Question
The circuit below shows two identical lamps and 4 closed switches. The options below identify a switch which is opened and a lamp which is being observed. Select the option that describes the behavior of the lamp when the switch is opened. _______ What happens to lamp D when switch B is opened? _______ What happens to lamp A when switch E is opened? _______ What happens to lamp D when switch F is opened? _______ What happens to lamp A when switch B is opened? _______ What happens to lamp A when switch F is opened? _______ What happens to lamp D when switch E is opened?Explanation / Answer
1.goes completely out.
When B is opened no current flows in path containing lamp D so it goes completely out.
2.goes completely out
Similar to what happens in 1
3.goes completely out
When F is opened no current flows in the circuit as cell gets disconnected.
4.Stays same
Even after opening B the voltage across A remains same as it is connected in parallel to cell so it draws same current as with closed B so brightness remains same.
5.goes completely out
When switch F is opened then again cell gets disconnected and no current flows in circuit and thus A goes out.
6.stays same
Similar reason as in 4
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